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Rectangular ATX power supply with side-mounted modular connectors, matte black finish, 140mm fan visible

Corsair

Corsair CP-9020254-NA RM1200x Shift 1200W power supply

SKU CH-CENW-KTZEM MPN CP-9020254-NA

A 1200 W fully modular ATX 3.1 supply with a side-mounted cable panel, 140 mm FDB fan and 80 PLUS Gold efficiency

  • TypeATX 3.1
  • Maximum Power1200 W
  • Fans1 x 140mm fluid dynamic bearing fan
  • Main Connector1x 24-pin ATX (24-pin) Connector
  • PCI-Express Connector4 x 6+2-Pin
  • SATA Power Connector16 connectors

Options ATX 3.1 80+ Gold (1200W) Shift

  • 1200 W continuous power for demanding builds
  • ATX 3.1 certified for PCIe Gen 5.1 platform support
  • Fully modular micro-fit connectors reduce cable clutter
  • Zero RPM fan mode enables silent operation at low loads
  • 105 °C Japanese capacitors ensure long-term reliability

1200W ATX 3.1 power supply

The Corsair RM1200x Shift delivers 1200 W of continuous power in an ATX 3.1 certified unit. It targets builders who need high headroom for multi-GPU systems or workstations with heavy transient loads. Fully modular Type 5 Gen 1 connectors reduce cable clutter inside the case. Cybenetics Gold efficiency and A- noise ratings confirm low waste heat and quiet running.

Check ATX 3.1 support and cable count

Verify that your motherboard and graphics cards are compatible with the ATX 3.1 power standard before ordering. The unit supplies one 24-pin ATX connector, two EPS connectors, four 6+2-pin PCIe connectors and sixteen SATA connectors. Ensure your component list matches these quantities and that your case can accommodate a 160 mm deep power supply.

Side-panel modular layout eases cable routing

The patented side-facing connector panel lets you plug cables in from the side rather than the rear, simplifying routing in tight compartments. Zero RPM fan mode stops the 140 mm fluid dynamic bearing fan at low and medium loads for silent operation. 105 °C Japanese electrolytic capacitors and Modern Standby support provide stable power and fast wake times.

Highlights

  • 1200 W continuous power for demanding builds
  • ATX 3.1 certified for PCIe Gen 5.1 platform support
  • Fully modular micro-fit connectors reduce cable clutter
  • Zero RPM fan mode enables silent operation at low loads
  • 105 °C Japanese capacitors ensure long-term reliability

Specifications

BrandCORSAIR
SeriesRMx SHIFT Series
ModelCorsair RM1200x
Part Numbercp-9020254-na
TypeATX 3.1
Maximum Power1200 W
Fans1 x 140mm fluid dynamic bearing fan
Main Connector1x 24-pin ATX (24-pin) Connector
PCI-Express Connector4 x 6+2-Pin
SATA Power Connector16 connectors
SLIYes
Haswell SupportYes
Max PSU Length160 mm
Modularfull modular
Efficiency> 87%
Energy-Efficient80 PLUS Gold, Cybenetics Gold certified
PSU Noise Levelcybenetics A-
Input Voltage100V a.c-240V a.c
200V a.c-240V a.c (Only for China &Korea)
Input Frequency Range47 - 63 Hz
Input Current15A-7.5A (100V a.c-240V a.c)
10A (200V a.c-240V a.c)
Output+5V@20A, +3.3V@20A, +12V@100A, +5Vsb@3A
MTBF>100000 hours
Connectors1 x ATX
2 x EPS
8 x PCIe
16 x SATA
8 x PATA
Cable Spec1x ATX CABLE 24-PIN (24): One cable (610mm)
2x EPS/ATX12V CABLE 8-PIN (4+4) : Two cables (650mm)
1x PCIe CABLE 12+4-PIN(12+4): One cable (650mm)
2x PCIe CABLE 8-PIN (6+2)X2: Two cables (650mm + 100mm)
4x PCIe CABLE 8-PIN (6+2): Four cables (650mm)
4x SATA CABLE (4 SATA - (right angle)): Four cables (450mm + 115mm + 115mm + 115mm)
2x PATA CABLE (4-PIN): Two cables (450mm + 100mm + 100mm + 100mm)
Power Rating1200W
FeaturesFully Modular, 80 PLUS Gold Certified, A- Noise Rating, Zero RPM Fan Mode, Modern Standby Support, Multi GPU Ready, 140mm FDB Fan, 10 Year Warranty, GEFORCE RTX 50 SERIES READY
Dimensions7.09" x 5.91" x 5.08"
Weight4.4 lbs
Package Content1x 24-pin ATX (24-pin) Connector
2x ATX 12V/EPS12V (4+4-pin) Connector
1x PCIe 5 (12+4-pin) 12VHPWR Connector
4x PCIe (6+2-pin, dual) Connectors
4x PCIe (6+2-pin) Connectors
16x SATA (Straight) Connectors
8x PATA Connectors
12V Power Connector2 x 8 pin EPS 12V, 1 x 24 pin ATX 12V
Peripheral Connector8 connectors
Top Fans Size140 mm
Top Fans Bearing TypeFluid Dynamic
Rear Fans Size140mm
Rear Fans Bearing TypeFluid Dynamic Bearing
Shipping weight3.90 kg
Package size312 × 216 × 135 mm

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Questions about this item

Does the RM1200x Shift include every cable I need or must I buy any separately?

The unit is fully modular with Type 5 Gen 1 micro-fit connectors; all required cables ship in the box so nothing extra needs purchasing.

How do I decide between the available capacities in this series?

This model delivers 1200 W continuous power; choose it when your GPU and CPU combined draw approaches that level, otherwise a lower-wattage RMx Shift unit will suffice.

What does the 1200 W rating actually mean once the PSU is installed in my PC?

It can supply 1200 W continuously at up to 50 °C ambient, meets ATX 3.1 and PCIe 5.1 transient-spike requirements, and holds 80 PLUS Gold plus Cybenetics Gold efficiency with A- noise.

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